When did Mississippi gives what as its main reason for succeeding from union?

Mississippi seceded from the Union on January 9, 1861, primarily citing the preservation of slavery as its main reason. In its declaration of secession, the state emphasized the belief that the election of Abraham Lincoln threatened the institution of slavery, which they viewed as essential to their economic and social order. The declaration specifically stated that the state's rights to maintain slavery were being jeopardized, leading to their decision to separate from the Union.